#include <stdio.h>
int main(){
  int i, *pi;
  pi = &i;
  i = 5;
  printf("i === *pi: i=%d ,*pi=%d ", i, *pi);
  *pi = 10;
  printf("i = %d\n", i);
  int x = 100;
  pi = &x;
  printf("*pi = %d\n", *pi);
  return 0;
}